CJ19-43 Contactor Series
Chint CJ19-43 Capacitor Contactor, 43A, 3P, PFC Application
3-pole 43A capacitor contactor for low-voltage power factor correction systems, with integrated surge suppression for safe switching of shunt capacitors up to 20 kVAr. Compatible with AC systems up to 690V.
Chint CJ19-43 is a capacitor-duty AC contactor designed for switching low-voltage shunt capacitors in power factor correction (PFC) systems. With a 43A rating and integrated surge suppression, it safely handles high inrush currents during capacitor switching and supports reliable reactive power compensation up to 20 kVAr.
Key Features
3-pole capacitor contactor for low-voltage power factor correction
Conventional thermal current 43A with 3 NO main contacts
Controllable capacitor: approx. 10 kVAr at 230V and 20 kVAr at 400V
Integrated surge suppressor to limit inrush current and over-voltage
Rated operational voltage up to 690V AC, 50/60 Hz
Rated insulation voltage typically up to 500/690 V
High mechanical life up to 1,000,000 operating cycles
Electrical life up to 100,000 switching cycles under capacitor duty
Multiple coil voltage options (110V, 220V, 230V, 380V AC; model-dependent)
Auxiliary contact options (e.g. 2NC, 1NO+1NC, 2NO) for control and signalling
DIN rail or bolt mounting for easy integration in PFC panels
Conforms to IEC 60947-4-1 and CE requirements
Robust design suitable for -5°C to +40°C and installation up to 2000 m altitude
Technical Specifications
| Parameter | Value |
|---|---|
| Model | CJ19-43 |
| Brand | Chint |
| Product Type | Capacitor Duty Contactor |
| Application | Low-voltage shunt capacitor switching, PFC systems |
| Conventional Thermal Current (Ith) | 43 A |
| Rated Current Ie (at 380V) | ~29 A (capacitor duty) |
| Controllable Capacitor (at 230V) | ~10 kVAr |
| Controllable Capacitor (at 400V) | ~20 kVAr |
| Number of Poles | 3 poles |
| Main Contacts | 3 NO (3P) |
| Auxiliary Contacts (by variant) | e.g. 2NC / 1NO+1NC / 2NO |
| Rated Operational Voltage (Ue) | Up to 690 V AC |
| Rated Insulation Voltage (Ui) | Up to 500 / 690 V |
| Frequency | 50 / 60 Hz |
| Surge Capacity | Up to 20 × Ie inrush (restrained surge capacity) |
| Tripping/Operating Class | Capacitor switching duty |
| Operating Temperature Range | -5°C to +40°C |
| Max Installation Altitude | Up to 2000 m |
| Coil Type | AC coil |
| Typical Coil Voltages (by variant) | 110V, 220V, 230V, 380V AC |
| Standards Compliance | IEC 60947-4-1, CE |
| Mounting | DIN rail or bolt-on panel mounting |
| Mechanical Durability | Up to 1,000,000 operations |
| Electrical Durability | Up to 100,000 operations |
| Safety Features | Surge suppression, insulated terminal covers (model-dependent) |
| Approx. Dimensions (L × W × H) | ~10 × 9 × 13 cm (approx.) |
| Approx. Weight | ~0.8 kg (approx.) |
Applications
Automatic power factor correction (APFC) panels
Manual and semi-automatic PFC banks
Reactive power compensation in LT distribution boards
Capacitor banks for industrial plants, utilities, and commercial buildings
PFC systems in HVAC, chiller and large motor installations
Any low-voltage system requiring reliable capacitor switching
What’s in the Box?
1 × Chint CJ19-43 Capacitor Contactor (coil voltage and aux version as ordered)
Basic product labeling and terminal markings
Manufacturer packing and documentation (if supplied by OEM)
FAQ
Q1. What is the main application of the Chint CJ19-43 contactor?
A1. The CJ19-43 is designed for switching low-voltage shunt capacitors in power factor correction (PFC) systems, not for standard motor control.
Q2. What capacitor sizes can CJ19-43 control?
A2. Typical ratings are approx. 10 kVAr at 230V and 20 kVAr at 400V. The actual selection should consider system voltage, harmonics, and capacitor manufacturer guidelines.
Q3. Why is surge suppression important in capacitor contactors?
A3. Capacitor switching produces high inrush currents. The built-in surge suppressor in CJ19-43 limits inrush and overvoltage, protecting both capacitors and the contactor and increasing service life.
Q4. What coil voltages are available for CJ19-43?
A4. The series is available with various AC coil voltages, such as 110V, 220V, 230V, and 380V, depending on the sub-model (e.g., CJ19-43/02, CJ19-43/11, CJ19-43/20).
Q5. What auxiliary contact options are offered?
A5. Different sub-models provide auxiliary combinations like 2NC, 1NO+1NC, or 2NO to suit different indication and interlock schemes.
Q6. Can CJ19-43 be mounted on a DIN rail?
A6. Yes. It supports DIN rail or bolt-on panel mounting, making it easy to integrate into APFC panels and distribution boards.